Which of the following is a PHP function that changes the permissions on a file?
a. ch perm()
b. ch mod()
c. ch grp()
d. ch own()
b. chmod()
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Given K equally sized clusters, the probability that a randomly chosen initial centroid will come from any given cluster is 1/K, but the probability that each cluster will have exactly one initial centroid is much lower. (It should be clear that having one initial centroid in each cluster is a good starting situation for K-means.) In general, if there are K clusters and each cluster has n points, then the probability, p, of selecting in a sample of size K one initial centroid from each cluster is given by Equation 8.1. (This assumes sampling with replacement.) From this formula we can calculate, for example, that the chance of having one initial centroid from each of four clusters is 4!/44 = 0.0938.
(a) Plot the probability of obtaining one point from each cluster in a sample
of size K for values of K between 2 and 100.
For K clusters, K = 10, 100, and 1000, find the probability that a
sample of size 2K contains at least one point from each cluster. You can
use either mathematical methods or statistical simulation to determine
the answer.
What is a class?
A. a set of characteristics and behaviors that define an object. B. a job description. C. A and B. D. none of the above.
To add a circle object into a pane, use _________.
a. pane.add(circle); b. pane.addAll(circle); c. pane.getChildren().add(circle); d. pane.getChildren().addAll(circle);
Keystroke mode allows you to move from record to record and field to field using keystrokes
Indicate whether the statement is true or false